Photo Protractor vs Smart Protractor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Photo Protractor
This app functions as a digital protractor, allowing users to measure angles and radians directly from photos. Simply take a picture, position the measurement area, and adjust the lines to get precise readings. It's an easy-to-use tool for quick angle calculations.
- Measure angles from photos
- Display angles and radians
- Adjustable measurement lines
- Easy-to-use interface
- Take pictures for measurement
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分度器アプリです。【使い方】写真を撮ります。移動ボタンを押して、写真の測定部分を測定円の中心にスライドスライド。角度ボタン、始線ボタンで測定線をクルクル移動すれば角度とラジアンが表示されます。簡単でしょ。（＾＾）／ It is a protractor app. [How to use] it will take a picture. Press the Move button, and slide slide the measurement part of the photo in the center of the measuring circle. Angle button, you will see the angle and radian if twirl move the measuring line in the initial line button. It is easy. (^^) /
Smart Protractor
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A simple and accurate tool for measuring angles right on your iPhone. With camera support and image import, you can easily overlay a virtual protractor on real-world objects or photos. Zoom, rotate, and pan with intuitive gestures to get the exact view you need. Whether you’re tackling DIY projects, woodworking, or academic tasks, this app helps you find precise angles quickly and easily. Features: - Import and overlay images for easy angle measurement - Multi-touch controls for zoom, rotation, and panning - Clean, user-friendly interface designed for quick use on the go Perfect for anyone who needs reliable and precise angle measurement anytime, anywhere.
Screenshots
Verdict
The clearest difference is in-app purchases: Photo Protractor at none against Smart Protractor's 2. Photo Protractor also leads on iOS requirement (8.0 vs 17.2). Smart Protractor's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Smart Protractor sells 1 one-off in-app purchase. Photo Protractor asks for nothing beyond the download.
Photo Protractor ships an update every 2 months, Smart Protractor every 2 weeks. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.
| Parameter | Photo Protractor | Smart Protractor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (39 ratings) — better | — |
| Positive reviews | 79.3% of reviews | — |
| Number of ratings | 39 — better | — |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 11 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Mayumi Kato | Jun Yamabe |
In-app purchases
Photo Protractor
No in-app purchases
Smart Protractor
- Remove Ads2 variants$2.99
Questions
Is Photo Protractor free?
Is Smart Protractor free?
Do Photo Protractor or Smart Protractor have ads?
Which is updated more often, Photo Protractor or Smart Protractor?
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